Jaw-type crusher

ABSTRACT

A crusher having a pair of opposed jaw members in which one jaw member is stationary and the other jaw member is movable. A first eccentric means rotates the upper end portion of the movable jaw member, and a second eccentric means rotates one end of an elongated beam, the opposite end of which is fixed to the lower end portion of the movable jaw member. The eccentric means are both driven synchronously, preferably in a 2:1 ratio.

Unite Bogie States atent [191 JAW-TYPE CRUSHER [76] Inventor: Nelson H. Bogie, Rt. 1, Gilbertsville,

[22] Filed: Aug. 9, 1973 [21] Appl. No.: 387,005

[ Jan. 14, 1975 6/1967 Connolly et a]. 7/1967 Cowher [57] ABSTRACT A crusher having a pair of opposed jaw members in which one jaw member is stationary and the other jaw member is movable. A first eccentric means rotates the upper end portion of the movable jaw member,

[56] Cm 215.552;112.?iitfigiiiifiififii 11,251 "13 UNITED STATES PATENTS I, the lower end portion of the movable jaw member.

guchafnan The eccentric means are both driven synchronously, usta Son 2,605,051 7/1952 Bogie 241/264 x preferably m a 2,868,464 1/1959 Parker 241/217 X 4 Claims, 2 Drawing Figures 38 /16 l N 7 I 40 {0 60 k/ 51 52 Z2 30 I 13 I 2 O l 7 l 1 f2; 47

JAW-TYPE CRUSHER BACKGROUND OF THE INVENTION This invention relates to an apparatus for crushing rock or other solid materials, and more particularly to a jaw-type crusher.

while a lower rotary eccentric mechanism is provided with an exterior race engaging a wear plate at the lower end of the movable jaw member for reciprocably laterally moving the lower end of the movable jaw member relative to the lower end of the fixed jaw member for crushing rock therebetween. The prior Bogie patent also describes the two eccentric rotary mechanisms as being driven synchronously in the same direction, the lower mechanism rotating at twice the number of revolutions as the upper rotary mechanism. The rotation is timed so that the upper portion of the movable jaw member is moving vertically while the lower crusher surfaces of the jaws are inoperatively spread apart, and the upper end of the movable jaw member moves horizontally while the jaws are moved together for operatively crushing the rock.

Applicant is also aware of a Swing Bar Jaw Crusher produced by Allis-Chalmers which has only a single rotary eccentric mechanism for rotating the upper end of a movable jaw, while the lower end of the movable jaw is fixed to one end of an elongated flexible swing bar made of laminated leaf spring. The opposite end of this spring bar is fixedly mounted to the frame.

of the crusher.

SUMMARY OF THE INVENTION It is therefore an object of this invention to provide a jaw-type crusher somewhat similar in structure to ap-' plicants above original US. Pat. No. 2,605,051, but without the race and wear plate of the lower eccentric rotary mechanism.

The crusher apparatus made in accordance with this invention includes the same type of fixed jaw member and a movable jaw member having generally the same structure as its counterpart in the original Bogie patent.

The eccentric rotary mechanism for supporting the upper end portion of the movable jaw member is also the same in this apparatus as in the previous Bogie rock crusher. However, the wear plate, exterior race and rotary eccentric mechanisms located at the lower portion of the movable arm member have been completely replaced in the apparatus made in accordance with this invention.

One end of an elongated beam is fixed to the lower portion of the movable jaw member adjacent the lower crushing surface of the movable jaw member. The opposite end of this beam is connected to a rotary eccentric mechanism, which in turn is located in the front portion of the frame on the opposite side of the fixed jaw member from the movable jaw member. Both rotary eccentric mechanisms are operatively connected by synchronous means, such as a gear train, and are simultaneously driven to provide the same timed and relative motion produced in the original Bogie US. Pat. No. 2,605,051.

By substituting the new, eccentrically driven, elongated beam fixed to the lower portion of the movable jaw member, the continuous wear of the eccentrically rotating outer race of the lower eccentric mechanism of the previous Bogie apparatus against the wear plate is eliminated. Such continuous wear created a sizable problem in the previous Bogie rock crusher because of the continuous movement, and the extreme forces, stresses and hard usage inherent in a rock crusher. Because of this excessive wear, frequent replacements of the eccentrically driven race, as well as the wear plate was necessary.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevation of the crushing apparatus made in accordance with this invention, with portions of one side wall broken away; and

FIG. 2 is a fragmentary side elevation of the jaw members disclosing a modified eccentric linkage for the movable jaw member.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings in more detail, FIG. 1 discloses a crushing apparatus 10 including a frame 11 having a front wall 12, a rear wall 13, side wall 14 and side wall 15, the walls being greatly reinforced with the ribs 16 to provide the strength required for a'crushing apparatus.

Mounted adjacent the front wall 12 is a first or stationary jaw member 17 having an elongated upper angular portion 18 and a substantially vertical lower crusher portion 19. Both the upper portion 18 and lower portion 19 are covered on their interior surface by a correspondingly shaped wear plate 20, the lower portion of which constitutes the crushing surface 21. The upper end of the upper jaw portion 18 is pivotally supported by pin 22 between the side walls 14 and 15. The lower jaw portion 19 is supported against a frangible'toggle 24, the opposite end of which is supported by block 25 spaced from front wall 12 by the-shims 26. The jaw member 17 is held against the shims 26 by a tie bolt 27 pivotally connected to the jaw member 17 and adjustably connected to the front wall 12. Thus, by adding or removing shims 26 andadjusting the tie bolt 27, the jaw member 17 may be fixed in various stationary positions within the frame 11.

Spaced behind the stationary jaw member 17 within the frame 11 is a movable jaw member 30 having an elongated upper angular portion 31 and a substantially vertical lower crusher portion 32. The interior surfaces of both upper portion 31 and lower portion 32 are also covered by a correspondingly shaped wear plate 33, the lower portion of which constitutes the crushing surface 34. It will be noted that the upper portions 18 and 31 of the respective members 17 and 30 diverge upwardly to form a trough for receiving rock or other hard material to be crushed, and the lower portions 19 and 32 are spaced relatively close to each other and substantially parallel for effecting the crushing action upon the solid particles as the jaw portions 19 and 32 are moved laterally relative to each other.

The upper end of the upper jaw portion 31 defines a sleeve 35 receiving the outer race 36 of an anti-friction bearing 37. The inner race 38 of the bearing 37 surrounds an eccentric cam 39 fixed to a rotary shaft 40,

the opposite ends of which are journaled into side walls 14 and 15, and may carry a flywheel 41.

ward along the outsides of the respective walls 14 and 15. The upper end of each flexible beam 48 is also clamped between a pair of clamp bars 49 forming the lower portion of an eccentric sleeve 50. The eccentric sleeve 50 receives an outer race 51 of an anti-friction bearing 52, the inner race 53 of which surrounds an cecentric cam 54 fixed to a rotary shaft 55. The rotary shaft 55 is journaled in the opposite side walls 14 and 15. The rotary shafts 40 and 55 are synchronized by a gear train, including gear 57 fixed to shaft 40, intermediate gear 58, the gear 59 fixed to one end of the shaft 55. The intermediate gear 58 intermeshes with the gears 57 and 59, and the gear 57 is preferably twice the diameter of the gear 59 so that the shaft 55 is rotated twice the number of revolutions as the shaft 40 per unit of time. The gear 58 is supported on stub shaft 60 rotatably journaled in the side wall 14. The gears may be driven in any convenient manner by an appropriate motor and gear or belt transmission, not shown.

As the gear train 57 59 is driven in the direction of the arrows disclosed in FIG. 1, the sequence of rotation of the cams 39 and 54 are identical to the sequence disclosed in FIGS. 3 6 of the original Bogie US. Pat. No. 2,605,051. In the relative positions of the cams 39 and 54 disclosed in FIG. 1, the upper end portion 31 of the movable jaw member 30 is moving down, while the jaw crusher surface 34 is in its expanded or open position relative to the jaw surface 21. As rotation of the shaft 40 and 55 continues, crusher surfaces 21 and 34 will be drawn together in crushing position as the large portion of the cam 39 crosses over beneath the shaft 40, and also as it crosses over above the shaft 40 where there is relatively little vertical motion of the upper jaw portion 31.

In FIG. 2, the flexible beam 48 is replaced with a rigid beam 62. The lower end of the rigid beam 62 is connected by a pivot pin 63 to a block 64 fixed to the rear side of the crusher portion 32. This pivotal connection is necessary for the relative movement of the rigid beam 62 relative to the movable jaw member 30. Such movement is compensated for in the beam 48 by its longitudinal flexibility, thus requiring no pivotal connection. The upper end of the beam 62 comprises the same rotary eccentric mechanisms as that comprising the upper end of the flexible beam 48, and includes the eccentric sleeve 65 containing the outer race 51, hearing 52, inner race 53, eccentric cam 54 and shaft 55.

It will thus be seen that a crushing apparatus has been provided which will perform the same function as the original Bogie rock crusher disclosed in US. Pat. No. 2,605,051, without the disadvantage of shutting down the machine periodically in order to replace the worn wear plate and outer race of the lower rotary eccentric mechanism of the prior Bogie rock crusher.

What is claimed is:

1. A crushing apparatus comprising:

a. a frame having upper and lower end portions and front and rear portions,

b. a first jaw member mounted in said frame and having a first lower crusher surface,

c. a second jaw member within said frame, said second jaw member having an upper end portion and a second lower crusher surface proximately spaced behind and opposing said first crusher surface,

(1. first mounting means supporting the upper end portion of said second jaw member on said frame for rotary eccentric motion in a vertical plane,

e. an elongated beam having first and second ends,

f. connecting means fixing the first end of said beam to said second jaw member adjacent said second crusher surface, 7

g. second mounting means supporting the second end of said beam on said frame, remote from said second crusher surface, for rotary eccentric motion, in a vertical plane parallel to the vertical plane of said second jaw member,

h. said beam being flexible in its longitudinal vertical plane,

i. synchronous drive means for eccentrically rotating the upper end portion of said second jaw member and the second end of said beam for corresponding reciprocal motion of said second jaw member for crushing material between said opposed jaw surfaces.

2. The invention according to claim 1 in which said elongated flexible beam comprises elongated laminated leaf springs.

3. The invention according to claim 1 in which said second mounting means is mounted on the front portion of said frame in front of said first jaw member and above said opposed crusher surfaces.

4. The invention according to claim 1 in which said second mounting means supports the second end of said beam for rotary movement at twice the number of revolutions per minute as the rotary movement of the upper end portion of said second jaw member. 

1. A crushing apparatus comprising: a. a frame having upper and lower end portions and front and rear portions, b. a first jaw member mounted in said frame and having a first lower crusher surface, c. a second jaw member within said frame, said second jaw member having an upper end portion and a second lower crusher surface proximately spaced behind and opposing said first crusher surface, d. first mounting means supporting the upper end portion of said second jaw member on said frame for rotary eccentric motion in a vertical plane, e. an elongated beam having first and second ends, f. connecting means fixing the first end of said beam to said second jaw member adjacent said second crusher surface, g. second mounting means supporting the second end of said beam on said frame, remote from said second crusher surface, for rotary eccentric motion, in a vertical plane parallel to the vertical plane of said second jaw member, h. said beam being flexible in its longitudinal vertical plane, i. synchronous drive means for eccentrically rotating the upper end portion of said second jaw member and the second end of said beam for correspondinG reciprocal motion of said second jaw member for crushing material between said opposed jaw surfaces.
 2. The invention according to claim 1 in which said elongated flexible beam comprises elongated laminated leaf springs.
 3. The invention according to claim 1 in which said second mounting means is mounted on the front portion of said frame in front of said first jaw member and above said opposed crusher surfaces.
 4. The invention according to claim 1 in which said second mounting means supports the second end of said beam for rotary movement at twice the number of revolutions per minute as the rotary movement of the upper end portion of said second jaw member. 